R.D. here's my 12 gauge very similar to yours, only noticeable difference in the two guns is mine has a gold star on the rib.
Serial number 412xx, circa 1887. 7 & 1/4 lbs, 26 inch barrels Right barrel .735 left .735 to .732. 14 & 1/4" pull. Drop at the comb 1 & 11/16" & 2 & 1/8" at the heel. I had the stock bent the drop was 3" at the heel.
Like I said I'm not crazy about the low hammers they are a little more difficult to let down in the field than normal hammers for me.